Lonely Mountains: Downhill

Hit a tree and land your body in the water -- pretty simple.

Load up the second trail on the first mountain (Graterhorn - Wandering Woods), and right after the second checkpoint is a big lake surrounded by trees. There is a nice cluster of trees right up against the water along the first curve after the checkpoint. Line yourself up, floor it into a tree (RT + A), and you should fly into the water. If you miss, the checkpoint is right there so it's a fast reset.

I accidentally got this grinding out on Mountain 1 (Graterhorn), Trail 1 (Widow's Ravine) right after checkpoint 6. Speed up and hit the big tree in front of you and you will fly off your bike and hear a splash if you know you did it right.

A key note: don't immediately hit after hitting the tree (it will restart checkpoint) or else you won't see/hear your rider hit the water.